Since the fifties sociology has been concerned with the phenomenon of social movements. Various theories tried to explain them. From collective behaviour to resource mobilization, through political processes and framing perspective all the way to the theory of new social movements, sociology found ways to explain these phenomena. Although all these perspectives cover and capture important facets and angles of collective action, they do so in disparate ways, looking at one side and neglecting the other. The differences between the perspectives come, on the one hand, from a change in the social, historical and scientific contexts, and on the other hand from the fact that the various approaches don’t ask the same questions, even though some questions overlap. Asking different questions leads to looking at different things. Thus, it is not only a matter of giving a different answer to the same question, but also a matter of looking at the same object of study from a different angle.
This situation resides at the root of the first part of my main thesis: the field of social movement theory is not sufficient nor integrated enough to explain collective action and we need a more comprehensive theory in order to obtain a better understanding of movements and the way in which they fulfill their role of promoters of change in society. Hence, I consider that we need a theory that is able to look at all facets of the movements at the same time and furthermore, is able to look beyond the form of the object in order to focus on the object itself. This brings me to the second part of the argument, which is the claim that the general systems theory as formulated by Niklas Luhmann can contribute to a better understanding of collective action. It is a comprehensive theory that can supplement the field of social movement theory by providing us with the necessary tools to look dynamically at social movements and understand them within the shifting social context.
An analysis of environmentalism will be used to show how the tools provided by this communication theory help us to better understand not only social movements but also the context in which they function, how they fulfill their role, how they are changed and in turn change society as well.